1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erik [133]
3 years ago
13

Quantization of energy lab Hypothesis: Make a prediction that describes the relationship between the composition of an unknown s

ubstance and its emission spectrum. For example, “If each element can be identified by its ______________, then the ____________ of an unknown star can be determined." variables: independent - dependent- control-
Chemistry
2 answers:
elixir [45]3 years ago
8 0

Answer:

If each element can be identified by its spectrum then the composition of an unknown star can be determined

Explanation:

The chemical nature of the elements is that they absorb specific wavelength of light depending on their atom. By spectral analysis of the spectrum of emitted light by a body, the body's composition can therefore be determined. As such in order to determine the composition of distant bodies such as planets, stars and other celestial bodies scientists usually make use of spectroscopy.

bezimeni [28]3 years ago
7 0

Answer:

If each element can be identified by its spectrum then the composition of an unknown star can be determined

Explanation:

You might be interested in
Convert 25 gram of carbon dioxide to mold
Rus_ich [418]

The atomic weight of carbon dioxide is about 12.011 + 15.999 + 15.999 = 44.009.

44.009 grams of CO2 = 1 mole of CO2             CO2 = Carbon dioxide

25 ÷ 44.009 ≈ 0.568

About 0.568 moles of CO2

7 0
4 years ago
A mixture of 10.0 g of Ne and 10.0 g Ar have a total pressure of 1.60 atm. What is the partial pressure of Ar
DaniilM [7]
The partial pressure of Ne is 1.06 atm. The answer is a. 1.1 atm

8 0
3 years ago
Read 2 more answers
A standard solution contained 0.8 mg/mL. A student took 2 mL of the standard solution and added 10 mL of water. What is the new/
galben [10]
To get the concentration of the second solution let us use the following formulae

C1V1=C2V2 where C1 is concentration of first solution and V1 is the volume of solution first solution. on the other hand C2 is the concentration of second solution and V2 is the volume of second solution.

therefore

0.8×2=(2+10)×C2
   1.6 =12×C2
1.6/12=C2
C2     = 0.1333mg/mL
7 0
3 years ago
Read 2 more answers
Help!!!!!!!!!!!!!!!!!!
skad [1K]

The density of the sample : 0.827 g/L

<h3>Further explanation</h3>

In general, the gas equation can be written  

\large {\boxed {\bold {PV = nRT}}}

where  

P = pressure, atm , N/m²

V = volume, liter  

n = number of moles  

R = gas constant = 0.082 l.atm / mol K (P= atm, v= liter),or 8,314 J/mol K (P=Pa or N/m2, v= m³)

T = temperature, Kelvin  

n= 1 mol

MW Neon = 20,1797 g/mol

mass of Neon :

\tt mass=mol\times MW\\\\mass=1\times 20,1797 =20.1797~g

The density of the sample :

\tt \rho=\dfrac{m}{V}\\\\\rho=\dfrac{20,1797}{24.4}=0.827~g/L

or We can use the ideal gas formula ta find density :

\tt \rho=\dfrac{P\times MW}{RT}\\\\\rho=\dfrac{1\times 20.1797}{0.082\times 298}\\\\\rho=0.826~g/L

8 0
3 years ago
In a chemical reaction at equilibrium, the rate of the forward reaction is______ the rate of the reverse reaction. If the rate o
zmey [24]

Answer:

equals

Explanation:

<h3>it means that forward reaction equals to reverse reaction</h3>
6 0
3 years ago
Other questions:
  • Question 4 (1 point)
    12·1 answer
  • Which compound has the lowest pka? (ch3ch2o2c)2ch2 ch3ch2o2cch2cho ch3ch2coch2cho phcoch2coch3 (nc)2ch2?
    5·1 answer
  • non metals are generally non conductors of electricity. Graphite is non metal but is is used as electrodes in batteries.
    7·1 answer
  • According to the following reaction, how many moles of iron(III) chloride will be formed upon the complete reaction of 26.2 gram
    9·1 answer
  • An atom bonds with another atom. What is the best classification for this reaction?
    12·2 answers
  • Molar mass of A1C1 3
    9·1 answer
  • In nature, organisms mate without human interference. This is called…
    13·2 answers
  • What happens as thermal energy is transferred from the core to the mantle
    10·1 answer
  • 1. Electronegativities of the elements Be, Mg, Ca, and Sr follow a specific trend within their group. Based on this trend, the a
    10·1 answer
  • When propyl alcohol is treated with acid, the initially formed intermediate is known as an oxonium ion. There is a scheme of a r
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!